Uncommon exoplanet 32 EP

HAT-P-11 c

RA 297.7102° · Dec 48.0819° · exoplanet

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Score breakdown

· 5 badges

32 pts · Uncommon

Uncommon 33 pts → Rare

Eccentric orbit +9
Frozen world +8
Multi-planet system +6
Confirmed exoplanet +5
Gas giant +4

Total score 32

1 more point to reach Rare.

Badges

Confirmed exoplanet · +5
Gas giant · +4
Frozen world · +8
Eccentric orbit · +9
Multi-planet system · +6

Trivia

What makes it special

Frozen world. A deep-frozen world far from its star's warmth.

Could we get there?

Verdict. Hopelessly far for any craft humanity can build today.

Getting there

Aboard Voyager 1. ≈ 2.2 million years at Voyager 1's speed (17 km/s).
Fastest probe ever. ≈ 192.3 thousand years even at the Parker Solar Probe's 192 km/s.
At 10% light speed. ≈ 1232 years in a starship at a tenth of light speed.
Distance. 123 light-years from Earth.

Look-back time

Look-back time. The light you'd see left around the year 1903.

Saying hello

Say hello. A radio message and its reply would take 246 years round-trip.

Standing on it

A year here. A full year lasts about 9.2 Earth years.

By the numbers

Size. About 13.2× the width of Earth.
Volume. About 2300 Earths could fit inside it.
Mass. Roughly 852× Earth's mass — about 2.7 Jupiters.
Your weight. You'd weigh about 4.9× your Earth weight standing here.
Temperature. A frigid -182°C — colder than dry ice.

How we found it

Discovery. Found by W. M. Keck Observatory using the radial velocity method.

Cosmic context

Crowded system. One of at least 2 planets orbiting its star.

Properties

density gcc: 2.04
discovery facility: W. M. Keck Observatory
discovery method: Radial Velocity
dist ly: 123.1718
eccentricity: 0.652
eq temp k: 91.58
insolation: 0.0161
mass earth: 851.7801
name: HAT-P-11 c
orbital period days: 3361
radius earth: 13.2
sys num planets: 2

About HAT-P-11 c

HAT-P-11 c is an uncommon exoplanet. It lies about 123.2 light-years from Earth, has an equilibrium temperature near 92 K, spans roughly 13.2 Earth radii and weighs about 851.78 Earth masses.

A deep-frozen world far from its star's warmth.

How to see it

Like any astronomical target, HAT-P-11 c is best seen from a dark site away from city lights, and when it is above the horizon depends on your latitude and the time of year. The visibility panel above works out tonight's viewing window for your saved location.

Why HAT-P-11 c is an uncommon exoplanet

HAT-P-11 c scores 32 points on Spacedle's rarity scale, which places it in the uncommon tier. Another 1 point would lift it into a rarer tier.

That score comes from 5 science badges — Confirmed exoplanet, Gas giant, Frozen world, Eccentric orbit and Multi-planet system — each earned for a real, measurable property of the object. Rarity on Spacedle is never random: the more remarkable an object's astrophysics, the more badges it collects, the higher it scores, and the rarer it ranks.